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<?php
declare(strict_types=1);
namespace ZipStream;
use DateTimeInterface;
/**
* @internal
*/
abstract class LocalFileHeader
{
private const SIGNATURE = 0x04034b50;
public static function generate(
int $versionNeededToExtract,
int $generalPurposeBitFlag,
CompressionMethod $compressionMethod,
DateTimeInterface $lastModificationDateTime,
int $crc32UncompressedData,
int $compressedSize,
int $uncompressedSize,
string $fileName,
string $extraField,
): string {
return PackField::pack(
new PackField(format: 'V', value: self::SIGNATURE),
new PackField(format: 'v', value: $versionNeededToExtract),
new PackField(format: 'v', value: $generalPurposeBitFlag),
new PackField(format: 'v', value: $compressionMethod->value),
new PackField(format: 'V', value: Time::dateTimeToDosTime($lastModificationDateTime)),
new PackField(format: 'V', value: $crc32UncompressedData),
new PackField(format: 'V', value: $compressedSize),
new PackField(format: 'V', value: $uncompressedSize),
new PackField(format: 'v', value: strlen($fileName)),
new PackField(format: 'v', value: strlen($extraField)),
) . $fileName . $extraField;
}
}